Method for fast transform coding based on perceptual quality and apparatus for the same
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United States of America Patent
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Dec 5, 2017
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app pub date -
Mar 8, 2017
filing date -
Jan 25, 2017
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Abstract
A method for fast transform coding in image compression is provided. The method includes performing prediction with respect to a current block, calculating a prediction error with respect to the current block, performing transform and quantization with respect to the current block, performing dequantization and inverse transform with respect to a transform coefficient generated through the transform and quantization, generating a reconstruction signal by summing a prediction signal generated in the performing of the prediction and a residual signal generated in the performing of the dequantization and inverse transform, calculating a rate-distortion (RD) cost related to the reconstruction signal, determining whether a size of the current block is a minimum block size, partitioning the current block into a plurality of sub-blocks, and performing transform coding with respect to the sub-blocks in response to determination that the size of the current block is not the minimum block size.
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